Fuel pump not running

[Radek]

Greetings to all;

This is a suite to the JB Weld thread, probably better addressed under a new heading.  Here's what happened:
Car is 88 90Q.  Since I couldn't get a new fuel line connecting the fuel pump to the pressure accumulator and a replacement was hard to find, I decided to temporarily bypass the accumulator so the car could be started and moved out of the garage. I went to the local boneyard and got some fuel line banjo fittings (17mm and 19mm) and connected the fuel pump directly to the fuel filter.  Car started without a problem and I drove it out of the garage.

The next day, though, it would not start anymore.  Fuel pump was dead.  Fuse is OK, fuel pump relay replaced with a known good one - no result.  With the ignition key "on" there seems to be no power to the pump's red terminal.  However, when hot wired, the pump works.

So, there must be something cutting the power supply to the fuel pump.  My question is:  is there any device in the car (fuel pressure sensor, for example) that would prevent power supply to the pump?  
Or should I look instead at the wiring and grounds?  BTW, would anyone know where to buy the fuel pump connectors (look like Marette twist electrical connectors)?  TIA.

Radek
88 90Q
V8Q 5-sp